Sorry no one answered this question today. We just start one thread.a day and you got replies on the other one. When you have a new question during the day, just change the subject title.
To answer this question, we usually wait for a number under 50 before giving high carb food. High carb wet food is preferable to dry food as dry food carbs hang around longer. A drop or two of honey on regular wet food also works.
When a kitty first reaches green numbers, a tsp or two of low carb wet food can help them surf good numbers.